Grill brush attachment having a rotating brush



FIG. 1 is a front isometric view of a grill brush attachment having a rotating brush in accordance with the new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a side view thereof.

The broken lines shown on the side of the grill brush attachment in FIGS. 1 and 6 and the broken lines shown on the attachment in FIG. 5 represent the bounds of the claim and all of the other broken lines are understood to illustrate the environment in which the article embodying the design is used. None of the broken lines form part of the claimed design. 

The ornamental design for a grill brush attachment having a rotating brush, as shown and described. 